function to set log(0)=0 not working on tables or vectors
David Winsemius <dwinsemius <at> comcast.net> writes:
On Jan 17, 2010, at 8:17 PM, maiya wrote:
There must be a very basic thing I am not getting... I'm working with some entropy functions and the convention is to use log(0)=0.
I suppose the outcome of that effort may depend on whether you have assumed the needed godlike capacities to change the laws of mathematics. But I suppose that as the Earth mother that might occur to you. Go ahead, define a new mathematics.
My guess is that the real intention here is to define 0*log(0) = 0 rather than log(0) = 0 -- really the assertion is that lim(x -> 0) x log(x) = 0, which must be true for some reasonable limiting conditions.